Synonyms for All the same:

adv

however (adverb)
be that as it may, withal.

adv.

all (adverb)
nonetheless, withal, however, nevertheless, still, even so, yet, notwithstanding.
however (adverb)
however.
still (adverb)
however, be that as it may, notwithstanding, nonetheless, yet, nevertheless.

n.

still and all, be that as it may, affirm. all the same (noun)
nonetheless, withal, however, nevertheless, still, even so, yet, notwithstanding.

Other synonyms:

still and all. nevertheless
nevertheless.
Other relevant words:
be that as it may, still and all.